org.zkoss.zk.ui.http

Class SimpleWebApp

java.lang.Object

org.zkoss.zk.ui.impl.AbstractWebApp

org.zkoss.zk.ui.http.SimpleWebApp

All Implemented Interfaces:

Locator, Scope, WebAppCtrl, WebApp

public class SimpleWebApp
extends AbstractWebApp

A servlet-based Web application.

Author:

tomyeh

Constructor Summary

Constructors

Constructor and Description
SimpleWebApp()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addScopeListener(ScopeListener listener) Adds a listener to listen whether this scope is changed.
java.lang.Object	getAttribute(java.lang.String name) Returns the value of the specified custom attribute.
java.util.Map<java.lang.String,java.lang.Object>	getAttributes() Returns a map of custom attributes associated with this object.
java.lang.String	getDirectory() Returns the directory used to resolve the relative path, or null if relative path is not allowed.
java.lang.String	getInitParameter(java.lang.String name) Returns the value of the named context-wide initialization parameter, or null if the parameter does not exist.
java.lang.Iterable<java.lang.String>	getInitParameterNames() Returns the names of the context's initialization parameters as an iterable String objects (never null).
java.lang.String	getMimeType(java.lang.String file) Returns the MIME type of the specified file, or null if the MIME type is not known.
java.lang.Object	getNativeContext() Deprecated. As of release 6.0.0, replaced with getServletContext().
java.lang.String	getRealPath(java.lang.String path) Returns a String containing the real path for a given virtual path.
java.net.URL	getResource(java.lang.String path) Returns a URL to the resource that is mapped to a specified path.
java.io.InputStream	getResourceAsStream(java.lang.String path) Returns the resource located at the named path as an InputStream object.
java.util.Set<java.lang.String>	getResourcePaths(java.lang.String path) Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument.
javax.servlet.ServletContext	getServletContext() Returns the servlet context of this application.
java.lang.String	getUpdateURI() Returns the URI for asynchronous update.
java.lang.String	getUpdateURI(boolean encode) Returns the URI for asynchronous update that can be encoded or not.
WebApp	getWebApp(java.lang.String uripath) Returns the WebApp that corresponds to a specified URL on the server, or null if either none exists or the container wishes to restrict this access..
boolean	hasAttribute(java.lang.String name) Returns if a custom attribute is associated with this object (scope).
void	init(java.lang.Object context, Configuration config) Initializes this Web application.
void	log(java.lang.String msg) Writes the specified message to a servlet log file, usually an event log.
void	log(java.lang.String msg, java.lang.Throwable ex) Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file.
java.lang.Object	removeAttribute(java.lang.String name) Removes the specified custom attribute.
boolean	removeScopeListener(ScopeListener listener) Removes a change listener from this scope.
java.lang.Object	setAttribute(java.lang.String name, java.lang.Object value) Sets the value of the specified custom attribute.

Methods inherited from class org.zkoss.zk.ui.impl.AbstractWebApp

destroy, getAppName, getAttribute, getAuDecoder, getBuild, getBuildStamp, getConfiguration, getDesktopCache, getDesktopCacheProvider, getFailoverManager, getIdGenerator, getSessionCache, getSubversion, getUiEngine, getUiFactory, getVersion, hasAttribute, loadBuild, removeAttribute, sessionDestroyed, sessionDidActivate, sessionWillPassivate, setAppName, setAttribute, setAuDecoder, setDesktopCacheProvider, setFailoverManager, setIdGenerator, setSessionCache, setUiEngine, setUiFactory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleWebApp

public SimpleWebApp()

Method Detail

init

public void init(java.lang.Object context,
        Configuration config)

Description copied from interface: WebAppCtrl

Initializes this Web application.

Specified by:

init in interface WebAppCtrl

Overrides:

init in class AbstractWebApp

Parameters:

context - the servlet context, if servlets are used. Currently, ZK supports only servlets. In the future there might be more to support.

config - the configuration (never null)

getAttribute

public java.lang.Object getAttribute(java.lang.String name)

Description copied from interface: WebApp

Returns the value of the specified custom attribute.

hasAttribute

public boolean hasAttribute(java.lang.String name)

Description copied from interface: Scope

Returns if a custom attribute is associated with this object (scope).

Notice that null is a valid value, so you can tell if an attribute is associated by examining the return value of Scope.getAttribute(java.lang.String).

setAttribute

public java.lang.Object setAttribute(java.lang.String name,
                            java.lang.Object value)

Description copied from interface: WebApp

Sets the value of the specified custom attribute.

Returns:

the previous value if any (since ZK 5)

removeAttribute

public java.lang.Object removeAttribute(java.lang.String name)

Description copied from interface: WebApp

Removes the specified custom attribute.

Returns:

the previous value if any (since ZK 5)

getAttributes

public java.util.Map<java.lang.String,java.lang.Object> getAttributes()

Description copied from interface: WebApp

Returns a map of custom attributes associated with this object.

addScopeListener

public boolean addScopeListener(ScopeListener listener)

Description copied from interface: Scope

Adds a listener to listen whether this scope is changed. The listener is called when a custom attribute is added, removed, or the parent is changed.

Returns:

weather the listener is added successfully. Note: if the resolver was added before, it won't be added again and this method returns false.

removeScopeListener

public boolean removeScopeListener(ScopeListener listener)

Description copied from interface: Scope

Removes a change listener from this scope.

Returns:

false if listener is not added before.

getUpdateURI

public java.lang.String getUpdateURI()

Description copied from interface: WebApp

Returns the URI for asynchronous update.

Both WebApp.getUpdateURI() and Desktop.getUpdateURI(java.lang.String) are encoded with Execution.encodeURL(java.lang.String)

See Also:

Desktop.getUpdateURI(java.lang.String)

getUpdateURI

public java.lang.String getUpdateURI(boolean encode)

Description copied from interface: WebApp

Returns the URI for asynchronous update that can be encoded or not.

Parameters:

encode - whether to encode with Execution.encodeURL(java.lang.String). It is the same as WebApp.getUpdateURI() if encode is true.

getWebApp

public WebApp getWebApp(java.lang.String uripath)

Description copied from interface: WebApp

Returns the WebApp that corresponds to a specified URL on the server, or null if either none exists or the container wishes to restrict this access..

getDirectory

public java.lang.String getDirectory()

Description copied from interface: Locator

Returns the directory used to resolve the relative path, or null if relative path is not allowed.

Note: if the returned directory is not null, it must end with '/'.

getResource

public java.net.URL getResource(java.lang.String path)

Description copied from interface: WebApp

Returns a URL to the resource that is mapped to a specified path.

Notice that, since 3.6.3, this method can retrieve the resource starting with "~./". If the path contains the wildcard ('*'), you can use Execution.locate(java.lang.String) to convert it to a proper string first.

Returns:

a URL for reading the resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource

getResourceAsStream

public java.io.InputStream getResourceAsStream(java.lang.String path)

Description copied from interface: WebApp

Returns the resource located at the named path as an InputStream object.

Notice that, since 3.6.3, this method can retrieve the resource starting with "~./". If the path contains the wildcard ('*'), you can use Execution.locate(java.lang.String) to convert it to a proper string first.

Returns:

an input stream for reading the resource, or null if the resource could not be found or the caller doesn't have adequate privileges to get the resource

getInitParameter

public java.lang.String getInitParameter(java.lang.String name)

Description copied from interface: WebApp

Returns the value of the named context-wide initialization parameter, or null if the parameter does not exist.

getInitParameterNames

public java.lang.Iterable<java.lang.String> getInitParameterNames()

Description copied from interface: WebApp

Returns the names of the context's initialization parameters as an iterable String objects (never null).

getRealPath

public java.lang.String getRealPath(java.lang.String path)

Description copied from interface: WebApp

Returns a String containing the real path for a given virtual path. For example, the path "/index.html" returns the absolute file path on the server's filesystem would be served by a request for "http://host/contextPath/index.html", where contextPath is the context path of this WebApp.

Notice that ZK don't count on this method to retrieve resources. If you want to change the mapping of URI to different resources, override UiFactory.getPageDefinition(org.zkoss.zk.ui.sys.RequestInfo, java.lang.String) instead.

getMimeType

public java.lang.String getMimeType(java.lang.String file)

Description copied from interface: WebApp

Returns the MIME type of the specified file, or null if the MIME type is not known. The MIME type is determined by the configuration of the Web container.

Common MIME types are "text/html" and "image/gif".

getResourcePaths

public java.util.Set<java.lang.String> getResourcePaths(java.lang.String path)

Description copied from interface: WebApp

Returns a directory-like listing of all the paths to resources within the web application whose longest sub-path matches the supplied path argument. Paths indicating subdirectory paths end with a '/'. The returned paths are all relative to the root of the web application and have a leading '/'. For example, for a web application containing

        /welcome.html
        /catalog/index.html
        /catalog/products.html
        /catalog/offers/books.html
        /catalog/offers/music.html
        /customer/login.jsp
        /WEB-INF/web.xml
        /WEB-INF/classes/com.acme.OrderServlet.class,

        getResourcePaths("/") returns {"/welcome.html", "/catalog/", "/customer/", "/WEB-INF/"}
        getResourcePaths("/catalog/") returns {"/catalog/index.html", "/catalog/products.html", "/catalog/offers/"}.
        
        

getNativeContext

public java.lang.Object getNativeContext()

Deprecated. As of release 6.0.0, replaced with getServletContext().

getServletContext

public javax.servlet.ServletContext getServletContext()

Description copied from interface: WebApp

Returns the servlet context of this application.

log

public void log(java.lang.String msg)

Description copied from interface: WebApp

Writes the specified message to a servlet log file, usually an event log. The name and type of the servlet log file is specific to the servlet container.

log

public void log(java.lang.String msg,
       java.lang.Throwable ex)

Description copied from interface: WebApp

Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file. The name and type of the servlet log file is specific to the servlet container, usually an event log.